Eu tenho rodado o Ubuntu no meu laptop há alguns anos e mudei para o 16.04 há alguns meses sem problemas. Eu saio regularmente no site com tanta frequência que conecto meu laptop a telas externas através de HDMI, além de usar um adaptador VGA para conectar projetores.
Eu nunca tive um problema com a segunda tela até ontem. Quando eu conecto um monitor, diretamente (HDMI) ou através do dongle do adaptador VGA, o Ubuntu o reconhece, mas nada é exibido.
Minhas telas mostram duas telas "Build in display" e "Goldstar company 23" , como sempre fizeram, e eu tentei trocar primária, secundária e espelhada sem sucesso. Eu também tentei ligar com ele ligado, não conectado, diferentes monitores, cabos diferentes, verificando se algo no BIOS foi desativado e tentei pressionar os vários botões do monitor para alternar entre o espelho externo etc.
Eu acabei de reinstalar o Ubuntu 16.04 novamente para ver se algo ficou à deriva em segundo plano e recebo a mesma coisa.
Obrigado pela sua ajuda!
xrandr mostra:
Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767
LVDS1 connected primary 1280x720+0+0 (normal left inverted right x axis y axis) 293mm x 164mm
1366x768 60.00 +
1360x768 59.80 59.96
1280x720 60.00*
1024x768 60.00
1024x576 60.00
960x540 60.00
800x600 60.32 56.25
864x486 60.00
640x480 59.94
720x405 60.00
680x384 60.00
640x360 60.00
DP1 disconnected (normal left inverted right x axis y axis)
HDMI1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 510mm x 290mm
1920x1080 60.00*+ 50.00 59.94
1920x1080i 60.00 50.00 59.94
1680x1050 59.88
1280x1024 60.02
1280x960 60.00
1152x864 59.97
1280x720 60.00 50.00 59.94
1024x768 60.00
800x600 60.32
720x576 50.00
720x480 60.00 59.94
640x480 60.00 59.94
VGA1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
lspci mostra
00:00.0 Host bridge: Intel Corporation 3rd Gen Core processor DRAM Controller (rev 09)
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
00:14.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller (rev 04)
00:16.0 Communication controller: Intel Corporation 7 Series/C210 Series Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2 (rev 04)
00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 1 (rev c4)
00:1c.1 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 2 (rev c4)
00:1c.2 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 3 (rev c4)
00:1d.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation HM77 Express Chipset LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation 7 Series Chipset Family 6-port SATA Controller [AHCI mode] (rev 04)
00:1f.3 SMBus: Intel Corporation 7 Series/C210 Series Chipset Family SMBus Controller (rev 04)
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller (rev 05)
03:00.0 Network controller: Intel Corporation Centrino Wireless-N 2230 (rev c4)